A car travels up a mountain with a 10% grade. This means the slope goes up 10 feet for every 100 horizontal feet. Rise/run. 10/100. Rise/Run. Rise up 10 feet for every 100 foot run.
Janet has to travel through the Rockies to get to her cabin in the woods. She starts in Denver and ends up in Aspen. It is a 50 miles to get there. She rises 5 miles. What is the grade/slope?